Caiques are a little different than other parrots in that they are content to be AROUND you, meaning you dont have to be interacting with them 24/7 to be spending time with them. Theyve been described as cat-like in the sense that they are very happy just in your presence but dont always want or need your interaction. The key is making sure their enclosure has lots of toys to shred and destroy, perches to climb, wooden ladders are great fun! Mine will spend hours in and around his cage playing or eating or taking a bath, even when his cage door is open and he can go wherever. Hell come to me for a bit, then decide "nah, imma go swing and eat" and do that and then preen forever. Ive never had trouble getting work done at home (except that im almost always talking to him or singing with him or make excuses to stop what im doing to give him a scritch lol). As long as you take time to play with him and give him lots of stimulating things to do your buddy should be fine :3
edit: def agree with bill e as well on the velcro thing! find a good balance for yourselves :3
As for car rides, ours hasnt seemed to care at all from day 1. But we always keep him in an enclosed carrier so the most he does is flock call. But Ive seen people who get their caiques accustomed to travel with positive reinforcement and they seem to enjoy getting out. they are insatiable curious most of the time! def never have him off a harness or if he has no harness, keep him in a carrier of some kind for safety reasons. harness training can take quite a while though! go slow and be patient :3
and yeah like others said Id just be worried about strong odors or cleaners. i mean even the smell of burnt food can make them sick

scented candles too, things you wouldn't expect, can do them harm. so def look into that as thoroughly as you can!
every bird will be different tho. take the time to get to know your guy and never rush them :3